Milling-machine.



W. R.' LAKEY. MILLING MACHINE. APPLICATION FILED JULYza, 1912.

Patented Feb. 3, 1914.

INVENTOR WITN ESSES ATTORNEY.

COLUMBIA PMNDGRAPH Co.. WASHINGTON. D. c.

il TE WILLIAM n. LAKEY, or nniwroiv, TEXAS.

MILLING-MACHINE.

Specification of Letters Patent.

Patented Feb. 3, v1914i.

Appiication flied July 23, 1912. Serial No. 711,145.

To all flo/tom t may concern Be it known that I, YVILLIAM R. LAKEY, a citizen of the United States, residing at Denton, in the county of Denton and State of Texas, haveI invented a new and useful hIilling-lviachine, of which the following is a specification.

This invention has reference to improvements in milling machines and its objectis to provide a machine which will more thoroughly remove dirt and other substances which should not follow the stock than has heretofore been the case, and carry the removed material to the dust collector for further treatment, and which will cool and partially dry the stock, thereby aiding in the subsequent grinding and bolting to a commensurate extent, this greatly improving the quality of the product and also increasing the yield and profits.

In accordance with the present invention the direction of travel of the stock is broken many times, while the fall of stock from one directing changing means to the next is short, thereby admitting of strong air currents without liability of carrying away any parts of the falling stock except those which it is desirable should be extracted by such air currents. In the present machine the air currents traverse the falling stock during each fall, while the parts are so dimensioned as to prevent any change in the action of the air currents on the dropping stock at different parts of the apparatus, so that there is no liability of uneven action of the Vair currents and consequent escape of some portions of the removable parts of the stock being carried by said stock beyond the action of the air currents.

The invention will be bestunderstood from a consideration of the following detailed description taken in connection with the accompanying drawings forming a part of this specification, with the understanding that while the drawings illustrate practical forms of the invention it is susceptible of other practical embodiments, wherefore the invention is not confined to any strict conformity to the showing of the drawings but may be changed and Vmodified so long as such changes do not mark any material departure from the salient features of the invention.

In the drawings Figure 1 is an elevation of a machine designed to break stock. Fig. 2 is a section on the line 2 2 of Fig. 1.

Referring to the drawing there is shown a casing 1 through the4 center of which there extends an air trunk 2 which is assumed to be connected by a pipe 3 with a suction fan, the latter not being shown, but being commonly employed in connection with machines of the character of the present invention. Within the pipe 3 is a cut-olif valve -1 which may follow the usual praetice. The top of the casing 1 on opposite sides of the air trunk is entered by inlet ducts 5, 6, respectively, while the other or bottom end of the casing is contracted, as indicated at 7, to discharge openings v8, while extending across the discharge portion of the casing is a support 9 crowned by a deflector 10' in the form of an inverted V with its apex substantially central to the air trunk and at approximately the lower end of the latte-r. Extending from opposite sides of the air trunk are spaced baffles 11 and in alternate relation to these baffles are other baflies 12 extending from the corresponding faces of the casing 1. The bai-Hes all decline at a suitable angle and their interspersed free edges are Varranged one below the other in line with the inlets 5 and 6, respectively. Where each baille 11 joins the air trunk there is an opening or port 13 entering the air trunk and where each bailie 12 joins the corresponding face of the casing 1 there is an opening or port 14, the latter being provided with an adjustable cut-off or valve 15 which may be held in adjusted positions by fastening nuts 16 or other suitable devices. Let it be assumed that air is being withdrawn from the trunk 2 through the pipe 3 and consequently air is entering the trunk through all the ports 13. Stock is assumed to be entering the casing through the inlets 5 and 6. The stream of stock strikes the uppermost baiiies 12 and by them is deflected on tothe next succeeding battles 11 and falls freely between these two battles in a stream of appropriate size. From the uppermost baffles 11 the stream of stock is directed on to the second set of baffles 12, thence its direction of flow is diverted to the second set of battles 11 and so on throughout the series of baiiles until finally falling from the lowermost baflies 11 the streams find their way to the discharge openings 8 and to a conveyer or other suitable means, whereby the cleaned stock is conveyed to a suitable point of disposal. Underneath each baflie is a port 13 or 1i as the case may be, the lowermost baliies l1 beingl coincident with the lower end of the air trunk so that such lower end which is open constitutes inlet 3, ports to the air trunk below such baffles.

It will be noted that the fall from each iaiile to the next succeeding battle is the same throughout the apparatus, while the ports 13 entering the air trunk may be all alike and the ports 14 entering through the walls of the casing may be adjusted as circumstances may require. There are, therefore, streams of air entering the casing underneath each baille 12 to pass through a stream of stock falling from such baiiie on to the next lower baffle and from thence passing to the air trunk through the port 13 underneath the next higher baffle. rlhe bafiies are so disposed that the fall of the stream of stock is short, wherefore the air currents may be made much stronger than has heretofore been the custom and much of the material which it is desirable to remove with the light dust is carried into the air trunk without liability of also carrying the heavier material which it is desired should go to the grinding rolls. lt is to be observed that the air ports which lead into the air trunk are also located considerably higher than the portions of the streams traversed by the air reaching them, and this is also true of the air inlet ports to the interior of the casing, and even though the heavier particles be constrained to follow the air streams their weight soon overcomes such tendency, whereupon they fall upon the battles to be directed thereby again into the stream of stock.

it is to be observed that the course of the stream of stock is many times broken in traversing the apparatus and each time the course of the stream of stock is broken it is subjected to an air current of suiiicient strength to extract those materials which it l is desirable should be removed from the stock, so that should certain materials escape the first air currents they will be acted upon by subsequent air currents until ultimately the stream of stock reaches the outlets 8 in a markedly clean condition. Moreover, the numerous streams of air each independent of the other and traversing its own individual falling stream of stock not only cleanses the stock but cools and dries it, so that it reaches the grinding rolls in such condition as to not only improve the quality of the product, but the yield is increased, and profits are correspondingly increased. in the present apparatus the action of the air currents on the stream of stock is substantially the same throughout the apparatus and at all falls or drops of the stream from one baffle to the other.

The inverted V-shaped deliector at the lower end of the air trunk serves to prevent filling of the air trunk as might occur were this deflector omitted. The employment of the centralized air trunk with passages for stock on opposite sides thereof greatly increases the capacity of the machine without materially increasing the cost of operation.

lt is advantageous to employ strong air streams, since the cleansing is much more effective than where the air streams are of less force, but in devices as heretofore constructed for like purposes no attempt has been made to practically unify the air streams so far as their effect is concerned, and to distribute these air streams throughout substantially the whole range of movement of the stock through the apparatus.

lVhat is claimed is 1. ln a machine for the purpose described, a casing contracted at the lower endY and there provided with a discharge opening, an exhaust air trunk rising from the lower end of the casing and having its lower end spaced above and open to the discharge opening of the casing, a series of superposed declining baffles on and exterior to the air trunk, and the latter having an equal number of freely open air ports each in underlying relation to the upper end of a respective bae, and another series of declining baflles extending from an inner wall of the easing in opposition to and alternation with the first-named baliies, and the said inner wall of the casing being provided with as many air ports as there are battles thereon, each air port being associated with and individual to a respective one of the secondnamed battles and in underlying relation to the upper end thereof, the associated series of baffles discharging into the same discharge opening to which the exhaust air trunk opens at its lower end.

2. ln a machine for the purpose described, a casing contracted at the lower end into discharge openings, a centralized eX- haust trunk rising from the lower end of the casing with its inlet above and open to the discharge openings, a series of superposed declining batlies exterior to and on opposite sides of the air trunk and the latter being provided with an equal number of freely open air ports each in underlying relation to the upper end of a respective baliie, and other series of declining baffles on the opposite inner walls of the casing in opposition to and alternation with the first-named baffles, and the casing heilig provided with air ports equal in number to the secondnamed series of baffles with each air port individual to a respective bal'lie in underlying relation to the upper end thereof, the associated series of baliies on opposite sides of the air trunk discharging into the respective discharge openings to which the air trunk is common.

in a machine for the purpose described,

a casing contracted at the lower end into discharge openings, a centralized exhaust trunk rising from the lower end of the casing with its inlet above and open to t-he discharge openings, a series of superposed declining batiies exterior to and on opposite sides of the air trunk and the latter being provided with an equal number of freely open air ports each in underlying relation to the upper end of a respect-ive battle, and other series of declining baffles on the opposite inner walls ot the casing in opposition to and alternatio-n with the rst-named baiies, and the casing being provided with air ports equal in number to the secondnamed series of battles with each air port individual to a respective baiiie in underlying` relation to the upper end thereof, the associated series of batlies on opposite sides of the air trunk discharging into the respective discharge openings to which the air trunk is common, and each of the second-named series of air ports through the outer walls of the casing being provided with a controllable means for regulating its effective area.

d. In a machine for the purpose described, a suitable casing, a centrally located air trunk therein extending from the top of the casing to a point adjacent the bottom thereof, said air trunk carrying on each side series of battlesJ declining from the air trunk toward the corresponding wall of the casing and said air trunk being provided with an air port associated with each baffle and in underriding relation theretoI at the junction of the baliie with the air trunk, other series of declining baitles extending from correspondino` walls ot the casing in alternation with ant in opposite direction to the iirst named battles, the casing walls being provided with air ports each in underriding relation to the upper end of a corresponding Copies of this patent may 'be obtained for battle where joining the casing wall, and inlets for stock on opposite sides o-the air trunk and in line with the free edges of the corresponding series of battles, the casing also being provided with an inverted V- kshaped detlector in underriding centralized relation to the lower end of the air trunk.

5. In a machine for the purpose described, a suitable casing, a centrally located air trunk therein extending from the top of the casing to a point adjacent the bottom thereof, said air trunk carrying on each side a series of baiiies declining from t-he air trunk toward the corresponding wall of the casing and said air trunk being provided with an air port associated with each baiiie and in underriding relation thereto at the junction of the baffle with the air trunk, other series of declining baiiies extending from corresponding walls of the casing in alternation with and in opposite direction to the rst named baiiles, the casing walls being provided with air ports each in underriding relation to the upper end of al corresponding baiiie where joining the casing wall, and inlets for stock on opposite sides of the air trunk and in line with the free edges of the corresponding series of battles, the casing also being provided with an inverted V- shaped deiiector in underriding centralized relation to the lower end of the air trunk, and each air port through the walls of thecasing being provided with a regulating valve for determining its effective area.

In testimony, that I claim the foregoing as my own, I have hereto aihxed my signature in the presence of two witnesses.

VILLAM R. LAKE Y.

Vitnesses:

J. W. RAYZOR, R. T. MOY.

five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

